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body composition

Posted: Thu Sep 29, 2011 11:08 am
by atlas mike
I often use the skinfold calculator/body composition to find body fat percentile, lean weight, and fat weight. I recently did an experiment where I kept all of the parameters the same except for age. This produced much different results for all categories mentioned previously. Why would this happen?

Re: body composition

Posted: Thu Sep 29, 2011 11:22 am
by stuward
The formulas assume a certain amount of body fat other than subcutaneous fat. This generally goes up with age. There is no non-destructive way to directly measure this fat with a caliper. The best way to measure this is with a tape measure around your waist.

Re: body composition

Posted: Thu Sep 29, 2011 11:38 am
by atlas mike
Is there a test that, along with all of the components already put into the skinfold calculator, also ask for waist measurement and height? (Just trying to get the most accurate comparisons.)

Re: body composition

Posted: Thu Sep 29, 2011 1:18 pm
by stuward
I assume you've read this: http://www.exrx.net/Testing/BFTestComparisonStudy.html" onclick="window.open(this.href);return false;
This may help. http://www.ncbi.nlm.nih.gov/pubmed/17535865" onclick="window.open(this.href);return false; There is a free text there. I didn't read it.
Here's another: http://www.nature.com/oby/journal/v13/n ... 0567a.html" onclick="window.open(this.href);return false;

This booklet tells you how to take measurements. http://www.cdc.gov/nchs/data/nhanes/nha ... anthro.pdf" onclick="window.open(this.href);return false;

If you find anything definative, let us know. I know I'm interested in it and I'm sure others are. I think the Nature article might prove to be the most useful.